Hi Chas,
I would really like to replicate the behavior that you are experiencing to see if it is indeed hanging or if it is just going slow. Would you be willing to post the example system that you were trying so that I could take a look at it? Also, was your LabVIEW version a typo, or are you really using LabVIEW 3.0.1? If your example system actually has some information that you would not want to post on a public forum, then let me know, and we get the files transferred directly by email. I look forward to your reply. Have a good one.
Adam B.
Applications Engineer
National Instruments